Treść zadania

mierzwiol

Zad 4. Do egzaminu student otrzymał listę 20 zadań spośród których nauczył się 12. Na egzaminie losuje zestaw trzech zadań.
a) ile różnych zestawów zadań może wylosować?
b) ile może wylosować zestawów zadań w śród których zna odpowiedź na jedno pytanie?

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